Electric furnace



sept. 27, 1927. 1,6%714 A. D. KEENE ELECTRIC FURNACE Filed Feb. lO, 1925i//N/a//NU/ `WITNESSES: INVENTOR A/V/h D. Kee/76 n v ATTORNEY PatentedSept. 27, '1927.

...M mmmm ALVIN' D. HERNE, DE PELTJSB'URGH, EJENNSYLVANA, ASSIGNOR E0W'STNGHGUSE ELECTRIC t MANUFACTURING' COMPANY, A CORPOBTION F'EENNSYLVANLA.

Application tiled February 10, 1925. Serial No. 8,202..

My invention relates to electric furnaces and particularly to electricmattie furnaces. One object of my invention is to provide a convenientand practical means for mounting a resistor in. an electric Inutilefurnace.

Another object of my invention is 'to pro vide a work-receiving chamberrin an electric furnace that is muled from the heat of an electricresistor. A still further object of my invention is to provide anelectric furnace having a Work- ,receiving chamber therein comprising aplurality of sections, each section having a resistor supporting meansassociated therewith whereby the resistor or other parts associated ineach section may be readily removable from the furnace. y

In practicing my invention, I provide a furnace chamber comprising aplurality of refractory Walls'of any lWell known structure. AWork-receiving chamber is located therein havingnr a plurality ofsections co* operating in end-to-end relationfto form a substantiallyelongated chamberEach seetion is composed of a plurality of metallicAinterlocking castings, each' beibgtdesigned to support a refractoryresistpr supporting member thereon. A resistor member is associated Witheach section. of the Work re ceiving chamber and interloclrs with theresistor supporting` member` in a manner to vbe hereinafter more fullydescribed.

The metallic, interlocking castings are so designed .thatresistor-supporting members may be located both above and' belovg7 theworklreceiving chamber enclosed thereby. The resistor-supporting membersassociated with the lower portion of the Work-receiving chamber valsoserve to support lthe entire 0 Work-receiving chamber structure. Theresistor members employed for heatingthe Work-receiving chamber may be4of any prac tical design, but 1 prefer to use one comprising aplurality of preformed parallelextending return-bent convolutions,although I do not wish to be limited to this type 'if resistor member.

In the single sheety of drawing, Figure 1 is a view, partially'invertical sec o tion and partially in elevation, of a furnace embodyingmy invention; and

Fig. 2 isa View' partially in longitudinal section and partially inelevation ot the furnace-shown in Fig. 1.

""" .t furnace 11 compris@ a plurality et walls 12 enclosing a furnacechamber 13. One of the walls 12 comprises a slot 1l whereby Work may beintroduced into the chamber 13 or Work received therefrom. Any desirablemeans may be employed for this purpose as it constitutes no part of myinvention.

A refractory metallic casting member 15 interlocks with a similarcasting member 16 to form a section 17' of a Work receiving chamber- 18.The castings 15 and 16 have integral flange members 19 and 20,respectively, that are shaped. to form a longitudinally extending`portion of substantially channel form and adapted to receive re.sistor-supporting members 21 and'22.

rthe resistor-supporting members 21 and 22 'comprise a. pair ofabutting, cooperating, ceramic refractory lmembers 23 and 2% that arelocked together by pin members 25A that extend substantiallytransversely theren through. The refractory' members 23 and 24' are ofsubstantially L-shape and cooperate in operative position to form theresistorlsupporting member 21 that is of substantially Tfshape. Theresistor-supporting; member 21 is adapted to cooperate with the flange'members 19 and 20 of the casting members 15 and 16,

Resistor members 26 and 27 are supi ported .by refractory resistorsupporting members 21 and 22 in a manner that will non7 be described.Each of the refractory members 23 and 2i that cooperate to form therefractory resistor supporting members 21 and 22 has a plurality ofslots 28 that extend inwardly from the upper face of the resistorsupporting` members 21 and from the lower face of the resistorsupporting"` members 22. The slots 28 have o'set portions 29 :it theinnermost end thereof that are of sutlicient size to receive theconvolutions of the resistor' members 26 and 27.

By alining the edge portions of the slots 28, the resistor members 26and 27 are introduced thereinto, and a longitudinal movement of themembers 23 and 2l relatively to each. other permits the resistor members26 and 27 to be inserted into the otlset portions 29 associatedtherewith. The members are then inserted to secure the refra torymembers and 2e from further long.itridinal.

movement. and the resistor members 25 and 22'" are thereby securelyrnterloc red 'with the f :Wally rrector;e supporting are Cai. and lekThis method of interlocking the resistor members 26 end 27 withtherefractory supporting members 21 and 22 is specifically set forth inmy copending application Serial No. 4236 iled Jan, 23, i925, (Case blo.11,709) and which. is assigned to the llfestinghouse Electric andManufacturing Company The structure as hereinbeiicre set forthrepresents a complete unit comprising a plurality of intertting castingswhich inclose e Work-receiving chamber i8 enti which serve to supportrefractory resistor-supporting members 2l :in-cl 22 thet interloclieflwith a pair of resistor members 26 2?, the walls 3l and 32 of the.work-receiving chember 18 serving to inutile the were; passingtherethrough from the direct heeft regis of the resistor members 26 andAny elesiretl number oi' unitary sections may employed depending uponthe nontnrK-Ev of the Work pessing therethrough l lieve shown eplerality of removable sections l? that are placed in cooperating? enelto end reletion. A structure of this nature msj; be readily employed forbeet treating e plurality of metallic members 34 that ere drawntherethrough for the purpose set forth.

Various modifications and changes msj? be made Without departing fromthe spirit and scope of the invention7 therefore, only such limitationsshall be placed thereon are irnposed by the prior art or are set forthin the appended cleirns.

I claim as my invention: A

1. In an electric furns, the combination with a plurality of refractoryWalls enclosing a. furnace chamber, and4 A. inutile located therein, ofan electric resistor member snpportecl by said mufle in spsceiirele-tion therefrom, A

2. In an, electric furnace, the combination with a plurality ofrefractory Wells leaning a vfurnace chamber, e rouille locateel 'Withinsaid chamber and spaced from the Wells thereof, and means carried byscifi Ince for supporting resistor members thereon, eertain ofsaid meansalso servingr to spese said niulile above the licor of seid furnace inga furnace chambere and c muille locsteol 4. ln un electric furnace, thecombinstion i with s plurality o relraciory 'Wells enclosing a. fornacechamber, of 'plnreiit'y ol' muh e members locete` therein and 'forminge, morir-receiving chamber, scifi inulle members being disposed incoopcrzitting interloclzeol relation.

lin electric furnace, coznliii'mlion with o plurality ol` refractoryWells enclosinga @furnace chamber and a plurality ci nnillie memberslocated therein enel forming e Work-receiving chamber, seid muiliememloclred relation, of a plurality of refractory resistor-supportingmembers interlocked bers being disposed cooperating interwitn muniemembers.

6. :in on electric furnace., the combina-tion 'with nninrelity or'refractory wells enclosing` s )furnace chamber, e. plurality of rouillemembers located therein and forming a Work-receiving chamber, sanirouille members being clisposefi. in cooperating interlockecl rclation,enti a plurality of refractory resistorsupporting members interloclreilwith seid mullemembers, of o. resistor intcrlocked in operative positionwith. said refractory inembers. 4

L ln electric furnace,- the' combination with a plurality of refractoryWells enclosing o furnace chamber, e. plurality innllle members locatedtherein end forming e workreceiving; chamber, seid inutile membersbelocated in interloclre sections ext-ending in ccopestive enel-to-enilrelation, and a plurality of rerrectory resistor-supporting membershaving o plurelltf,7 of slots located therein supported ly said mulilemembers, of.

a resistor located in seid slots enti interloclrerl in operativeposition with seicl refractory member.

ln testimony "Where-'fnl9 here hereunto subscribefl my neme this orFebruary, M25

onli-ii n innen 'lli

